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# The Cheapest Number You Own Reaches Your Brain
- URL: https://primal-code.ghost.io/the-cheapest-number-you-own-reaches-your-brain/
- Published: 2026-09-23T16:00:10.000Z
- Updated: 2026-09-23T16:00:10.000Z
- Description: A trial of 9,361 people came up short on dementia. Then 326 Chinese villages ran the same idea for four years with trained neighbours, and the count came back 15% lower.
- Author: Primal code

| ✦ New Frontier Of Your Mind ✦ Thirty three thousand farmers. They live across 326 villages in rural China. Nobody there was seeing a brain specialist. Their neighbours were trained to hand out tablets and take readings… Four years on, the dementia count came back lower. // Quick Check First reaction? [🤯 Mind-blown](mailto:ario0auyov0xny@outlook.com?subject=Reaction:%20Mind-blown) [🔬 More like this](mailto:ario0auyov0xny@outlook.com?subject=Reaction:%20More) [🤷 Meh](mailto:ario0auyov0xny@outlook.com?subject=Reaction:%20Meh) // NerveQuiet Medtronic spent 14 years on a catheter aimed at pressure. It runs up from an artery in the leg to the kidney. Radio waves then burn the nerves riding along that vessel. Settle those nerves and pressure falls, with no tablet to swallow. The FDA cleared the device in November 2023. Its pivotal trial still came up short. Across 337 people, round the clock pressure fell only 1.9 mmHg further than the sham. That gap could be chance. Office readings did separate, by 4.8 mmHg. [↗ Source: Kandzari, JACC, 2023](https://www.jacc.org/doi/10.1016/j.jacc.2023.08.045) [↗ Source: the approval, Medtronic, 2023](https://news.medtronic.com/fda-approves-medtronic-symplicity-spyral-renal-denervation-system-for-high-blood-pressure-newsroom) Pressure is the cheapest number in this newsletter. A chemist will read it for nothing. High readings grind the small vessels that feed the brain. Two trials asked whether pushing that number down guards the mind… // The Facts 9,361 people in SPRINT, aimed at 120 or at 140 systolic. 0.83 the hazard ratio for dementia, wide enough to be chance. 0.81 the ratio for mild memory trouble, and that one held. SPRINT stopped early once the heart benefit showed. Its dementia arm never gathered the cases it needed. Mean age was 68, and everyone carried extra heart risk. Diabetes and past stroke were shut out. So this was not the general run of people with high pressure. [↗ Source: Williamson, JAMA, 2019](https://jamanetwork.com/journals/jama/fullarticle/2723256) // The Answer Jiang He’s team went at it with the numbers SPRINT never had. Half of the 326 villages carried on as usual. In the rest a trained neighbour built the tablets up, aiming at 130 over 80. Systolic came in 22 mmHg lower than usual care. After 48 months the dementia risk ratio sat at 0.85, at p 0.0035. That is a 15% cut, across 33,995 adults over 40. [↗ Source: He, Nature Medicine, 2025](https://www.nature.com/articles/s41591-025-03616-8) A lower number guards the mind. Most brain health copy sells a capsule long before a cuff. I spend more than $20,000 a year on private research… the sort hedge funds pay for. Walled off from the public. Then I ask what each trial could have found by luck alone. My own cuff sits by the kettle. Two readings a morning for a week, and that is one man’s report. // The Fix Seven days of readings // The Steps Read It At Home A cuff and one quiet week cover it. 01 Buy an upper arm cuff, picked off a validated list. 02 Sit for five minutes first. Keep your back supported and your feet down. 03 Take two readings at least a minute apart, morning and evening. 04 Keep that going for seven days, then average the lot. 05 Hand the average to your doctor. The tablets are their call. Guidelines put the goal under 130 over 80\. Your own target is your doctor’s to set. [↗ Source: the 2025 guideline, American Heart Association](https://newsroom.heart.org/news/new-high-blood-pressure-guideline-emphasizes-prevention-early-treatment-to-reduce-cvd-risk) // Quick Wins Wrist cuffs read looser than arm cuffs. Trials run on the arm. A surgery reading sits high for plenty of people. Seven mornings at home catch that. Those villagers all had pressure nobody had got under control. A settled reading is another question. Coffee, a cigarette and a full bladder each lift the number. Leave half an hour after them. // Your Pick Do you know your own number? Pick one and hit send. [🥋 Cuff at home already](mailto:ario0auyov0xny@outlook.com?subject=Poll:%20Cuff%20at%20home) [💊 On tablets for it](mailto:ario0auyov0xny@outlook.com?subject=Poll:%20On%20tablets) [🏥 Only at the surgery](mailto:ario0auyov0xny@outlook.com?subject=Poll:%20Only%20at%20the%20surgery) [🤔 Not a clue](mailto:ario0auyov0xny@outlook.com?subject=Poll:%20No%20idea) Stay primal,Dex Primal Code |
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